A straightforward one-pot synthesis of biologically important imidazolyl alcohols via catalytic epoxide ring-opening reactions
摘要:
A general and efficient method for the preparation of biologically important imidazolyl alcohols via ring-opening of epoxides with N-silylated imidazole catalyzed by LiBr under solvent-free conditions is reported. (C) 2012 Elsevier Ltd. All rights reserved.
An efficient method for regioselective ring opening of epoxides by amines under microwave irradiation using Bi(NO<sub>3</sub>)<sub>3</sub>·5H<sub>2</sub>O as a catalyst
作者:Shobha Bansal、Yogendra Kumar、Parveen Pippal、Dipak K. Das、Panchanan Pramanik、Prabal P. Singh
DOI:10.1039/c6nj03701a
日期:——
Bismuth(III)nitrate pentahydrate, a highly efficient environmentally benign catalyst, is used for the nucleophilic ringopening of epichlorohydrin and styrene oxide with aromatic, aliphatic and heteroaromatic amines under solvent free microwave conditions reducing the reaction time drastically to afford the corresponding β-amino alcohols in good to excellent yields with high regioselectivity. The products obtained were
硝酸铋(III)五水合物,一种高效的环境友好型催化剂,用于在无溶剂微波条件下与芳香族,脂肪族和杂芳香族胺一起对环氧氯丙烷和氧化苯乙烯进行亲核开环,从而大大缩短了反应时间,从而提供了相应的β-氨基醇具有良好的收率和优异的选择性,并具有较高的区域选择性。获得的产物通过柱色谱法直接纯化,并通过1 H和13 C NMR,FTIR和质谱进行表征。
Y(NO3)3·6H2O catalyzed regioselective ring opening of epoxides with aliphatic, aromatic, and heteroaromatic amines
作者:Mayur J. Bhanushali、Nitin S. Nandurkar、Malhari D. Bhor、Bhalchandra M. Bhanage
DOI:10.1016/j.tetlet.2008.03.152
日期:2008.5
Yttrium nitrate hexahydrate [Y(NO3)3·6H2O] was found to be an efficient catalyst for selective ring opening of epoxides with aliphatic, aromatic, and heteroaromatic amines at room temperature under solvent-free conditions. The system tolerated a variety of hindered and functionalized epoxides/amines and afforded the desired β-amino alcohols at low catalyst concentration.
Regioselectivity in a Highly Efficient, Microwave-Assisted Epoxide Aminolysis
作者:Harriet Lindsay、Hinal Desai、Brendan D’Souza、Devin Foether、Benjamin Johnson
DOI:10.1055/s-2007-965927
日期:2007.3
We have developed a microwave-assisted aminolysis of epoxides as an efficient method for synthesizing a number of β-amino alcohols. In most cases, including in reactions of amines with a trisubstituted epoxide, only one equivalent of amine is required to obtain good yields. The reactions are consistently regioselective for amine nucleophiles of varying strengths and for both hindered and unhindered epoxides. In some cases, this regioselectivity could be enhanced by using a polar aprotic or a non-polar solvent.
Mild regiospecific alcoholysis and aminolysis of epoxides catalyzed by zirconium(IV) oxynitrate
作者:Sandip S. Shinde、Madhukar S. Said、Trupti B. Surwase、Pradeep Kumar
DOI:10.1016/j.tetlet.2015.09.031
日期:2015.10
A regiospecific method for the ring-opening reaction of epoxides by the primary, secondary, tertiary alcohols, and aryl, aliphatic amines has been developed using non-toxic metal nitrate salt as a catalyst. The best results were obtained using zirconium(IV) oxynitrate among the various screened metal nitrate salts. The reported protocol works efficiently for styrene epoxide and aliphatic as well.
(+)-(2-Hydroxy-2-adamantyl)-1-imidazolyl-3-tolyl-methan und dessen Salze, Verfahren zu dessen Herstellung, diese Verbindung enthaltende Arzneimittel und dessen Verwendung
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0421199A2
公开(公告)日:1991-04-10
Die Erfindung betrifft das rechtsdrehende, das (+)-Enantiomere des (2-Hydroxy-2-adamantyl)-1-imidazolyl-3-tolyl-methans sowie dessen physiologisch verträglichen Säureadditionssalze.
Die genannten Verbindungen werden als Psychopharmaka, insbesondere als Antidepressiva, verwendet.
Weiterhin werden pharmazeutische Zubereitungen beschrieben, die die genannten Verbindungen als Wirkstoffe enthalten. Die pharmazeutischen Zubereitungen können oral, parenteral, intraperitoneal und/oder rectal appliziert werden.